Tractor trailer of the type carried on two wheels



1,626,185 APlll 26 1927' J. coDER ET AL TRACTOR TRAILER OF THE TYPE CARRIED ON TWO WHEELS y Filed. June l25,' 1925 Flea naz www /w/ ,w

Patented epr. 26, 1927.

UNETE STATES PATENT OFFICE.

JOSEPH CODER AND LOUS CODER, OF ST-MARCELLESJVARSEILLE, FRANCE.

TRACTOR TRAILER OF THE TYPE CARRIED ON V/O WHEELS.

Application cd June 25, 1926,'Sera1 No. 118,522, and in France April 26, 1926.

rlhis invention relates to improvements in tractor trailers of the type carried on two wheels and in which means are provided tor retaining it in the normal position when disconnected trom the tractor.

According to the invention an additional wheel is pivotally mounted on the chassis means being provided for raising it vertically into a casing when the trailer is connected up to the tractor consisting in carrying the wheel on arms the upper ends of which are pivotally connected to nuts travelling on left and right handed horizontal screws suitable gearing being provided for rotating the screws.

The invention will be described with reference to the accompanying drawings.

Fig. 1 is'a side elevation partly in section.

F ig. 2 is a 'front elevation of same. f

'A trame is pivotally connected. to the. trailer chassis by a stud 2. The Jframe is formed with two depending side members l provided with slides in which the axle 3 of a wheel can slide. rlihe axle 3 is connected to the trame by four arms 1l, two at each side of the wheel each arm being pivotally connected to a nut 5, the nuts 5 on one side ot the wheel being mounted on one right and lett handed screw 6 and those on the other side ot the wheel on a second right and lett handed screw 6.

The screws 6 are rotated by a train ot gearing 7 controlled by a hand wheel 8.

On account of the screws having a. lett and rioht handed pitch a rotation in one direction will bring the two nuts on each screw nearer together and that in the reverse direction will separate them giving a downward or upward movement respectively to the axle 3 and wheel. n this way the wheel can be brought into or removed from contact with the ground.

In order to facilitate the manoeuvring of the trailer the pivot pin 2 can be loosened so that the casing can be readily rotated in a vertical plane by pushing the trailer draw bar.

An arrangement as described has the advantage that the support can be raised when the trailer is connected to the tractor but the trailer is readily moved when disconnected therefrom.

It two twowvheeled trailers are coupled to a tractor the frame of the supporting wheel ot the second trailer is connected to the chassis ot the first by a coupling rod and can be used as a iront bogey.

Vilhat we claim as our invention and desire tol protect by Letters Patent is l. A supporting wheel for a two wheeled trailer comprising in combination with the trailer a trame pivoted thereto depending sides on the trame forming slides for the wheel axle, left and right han-ded screws carried horizontally by the frame, nuts thereon, and arms connected to the nuts and to the wheel axle so that the wheel axle is supported by the screws and vwhereby on the rotation of the screws the wheels can be raised and lowered.

2. A supporting wheel tor a. two wheeled trailer comprising in combination with the trailer a trame pivoted thereto, depending sides on the frame 'forming slides for the wheel axle, lett and right handed screws carried horizontally by the frame, nuts thereon, arms connected to the nuts and to wheel axle, so that the wheel axle is supported by the screws and a train of gear ing and a hand wheel for rotating the screws whereby the wheels can be raised and lowered.

3. A supporting wheel forl a two wheeled trailer comprising in combination with the trailer a frame pivoted thereto, depending sides on the trame forming slides for the wheel axle, two lett and right handed screws carried horizontally by the trame, two nuts on each screw, two pairs of arms pivoted to the wheel axle one on each side of the wheel each arm of each pair being pivoted to a nut so that the wheel axle is supported by the screws and whereby on the rotation of the screws the wheels will be raised and lowered.

l. A device for raising and lowering an auxiliary supporting wheel for a two wheeled trailer, said device comprising in combination with the trailer chassis, a trame pivotally connected to said chassis, two depending side members mounted on said trame, forming slide members for the wheel axle, rotatable screwed rods respectively threaded in opposite directions from the center towards the ends and supported in bearings stationarily mounted on said frame, nuts in positive engagement with the threads ot said rods, arms connected to said nuts and said wheel axle whereby on the rotation of said screwed reds the wheel can be raised and lowerede 5. A device for raising and lowering an auxiliary supporting wheel for a two wheeled trailer, said device Comprising` in Combination with the trailer chassis7 a frame pivotally Connected to said Chassis, two depending side members provided on each side of the pivot of said traine and forming slides for the wheel axle, two rotatable lett and right handed screwed rods each of which being supported in hearings stationarily mounted on said frame, two nuts in positive engagement with the threads on each screwed rod, two pairs of arms pivoted to the wheel axle on each side ol the wheel7 each arm of each pair 01"' arms being pivote-d to one of foresaid nut whereby on the ro tation of the screwed rods the wheel can he raised and lowered.

6. A device 'for raising` and lowering an auxiliary supporting wheel for a two wheeled trailer7 said device Comprising in combination with the trailer chassis, -a frame pivotally connected to said Chassis, two depending side members mounted on said frame, forming' slide members for the wheel axle, rotatable lelt and right handed srre wed rods supported in hearings stationarily mounted on said frame. nuts in positive engagement with the threads of said rods, arms connected to said nuts and said wheel axle, a train of gearing and a hand wheel for aeting` on said rods whereby the wheel can he raised and lowered.

In witness whereol'I we atlix our signatures. JOSEPH CODER.

LUIS CODER. 

